/* 下拉菜单容器 */
.dropdown {
    position: relative;
}

/* 下拉菜单触发按钮 */
.dropdown-toggle {
    padding-right: 1.5em;
    cursor: pointer;
}

.dropdown-toggle::after {
    content: '▼';
    font-size: 0.7em;
    margin-left: 0.5em;
    vertical-align: middle;
    transition: transform 0.3s;
}

/* 下拉菜单 */
.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(0, 0, 0, 0);
    min-width: 180px;
    padding: 0.5em 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

/* 下拉菜单项 */
.dropdown-menu li {
    display: block;
}

.dropdown-menu a {
    display: block;
    padding: 0.5em 1em;
    color: #fff;
    text-decoration: none;
    transition: background-color 0.3s;
}

.dropdown-menu a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: #ffd700;
}

/* 显示下拉菜单 - 仅在悬停时 */
.dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    visibility: visible;
}

/* 悬停时旋转箭头 */
.dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
}

/* 激活状态 */
.dropdown.active > a,
.dropdown-menu a.active {
    color: #ffd700;
}